'a test module'

__author__ = "Danni Ren"

import sys
def test():
    args = sys.argv
    if len(args) == 1:
        print("hello world!")
    elif len(args) == 2:
        print(f"hello {args[1]}")
        
    else:
        print("too many arguments")

if __name__ == '__main__':
    test()